tests: UnixStreamTransport test suite improvements

refs #3305

Change-Id: I6c6ca52a5e80266920ded811ff45fc568c3e59b9
diff --git a/tests/daemon/face/unix-stream-transport-fixture.hpp b/tests/daemon/face/unix-stream-transport-fixture.hpp
new file mode 100644
index 0000000..86c8af0
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+++ b/tests/daemon/face/unix-stream-transport-fixture.hpp
@@ -0,0 +1,146 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_TESTS_DAEMON_FACE_UNIX_STREAM_TRANSPORT_FIXTURE_HPP
+#define NFD_TESTS_DAEMON_FACE_UNIX_STREAM_TRANSPORT_FIXTURE_HPP
+
+#include "face/unix-stream-transport.hpp"
+#include "face/lp-face.hpp"
+
+#include "dummy-receive-link-service.hpp"
+#include "transport-test-common.hpp"
+
+#include "tests/limited-io.hpp"
+
+#include <boost/filesystem.hpp>
+
+namespace nfd {
+namespace face {
+namespace tests {
+
+using namespace nfd::tests;
+typedef boost::asio::local::stream_protocol unix_stream;
+
+/** \brief automatically unlinks the socket file of a Unix stream acceptor
+ */
+class AcceptorWithCleanup : public unix_stream::acceptor
+{
+public:
+  explicit
+  AcceptorWithCleanup(boost::asio::io_service& io, const std::string& path = "")
+    : unix_stream::acceptor(io)
+  {
+    this->open();
+
+    if (path.empty()) {
+      this->bind("nfd-unix-stream-test." + to_string(time::system_clock::now().time_since_epoch().count()) + ".sock");
+    }
+    else {
+      this->bind(path);
+    }
+
+    this->listen(1);
+  }
+
+  ~AcceptorWithCleanup()
+  {
+    boost::system::error_code ec;
+
+    std::string path = this->local_endpoint(ec).path();
+    if (ec) {
+      return;
+    }
+
+    this->close(ec);
+    boost::filesystem::remove(path, ec);
+  }
+};
+
+class UnixStreamTransportFixture : public BaseFixture
+{
+protected:
+  UnixStreamTransportFixture()
+    : transport(nullptr)
+    , remoteSocket(g_io)
+    , receivedPackets(nullptr)
+    , acceptor(g_io)
+  {
+  }
+
+  void
+  initialize()
+  {
+    unix_stream::socket sock(g_io);
+    acceptor.async_accept(sock, [this] (const boost::system::error_code& error) {
+      BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
+      limitedIo.afterOp();
+    });
+
+    unix_stream::endpoint remoteEp(acceptor.local_endpoint());
+    remoteSocket.async_connect(remoteEp, [this] (const boost::system::error_code& error) {
+      BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
+      limitedIo.afterOp();
+    });
+
+    BOOST_REQUIRE_EQUAL(limitedIo.run(2, time::seconds(1)), LimitedIo::EXCEED_OPS);
+
+    localEp = sock.local_endpoint();
+    face = make_unique<LpFace>(make_unique<DummyReceiveLinkService>(),
+                                make_unique<UnixStreamTransport>(std::move(sock)));
+    transport = static_cast<UnixStreamTransport*>(face->getTransport());
+    receivedPackets = &static_cast<DummyReceiveLinkService*>(face->getLinkService())->receivedPackets;
+
+    BOOST_REQUIRE_EQUAL(transport->getState(), TransportState::UP);
+  }
+
+  void
+  remoteWrite(const ndn::Buffer& buf, bool needToCheck = true)
+  {
+    boost::asio::async_write(remoteSocket, boost::asio::buffer(buf),
+      [needToCheck] (const boost::system::error_code& error, size_t) {
+        if (needToCheck) {
+          BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
+        }
+      });
+    limitedIo.defer(time::milliseconds(50));
+  }
+
+protected:
+  LimitedIo limitedIo;
+  UnixStreamTransport* transport;
+  unix_stream::endpoint localEp;
+  unix_stream::socket remoteSocket;
+  std::vector<Transport::Packet>* receivedPackets;
+
+private:
+  AcceptorWithCleanup acceptor;
+  unique_ptr<LpFace> face;
+};
+
+} // namespace tests
+} // namespace face
+} // namespace nfd
+
+#endif // NFD_TESTS_DAEMON_FACE_UNIX_STREAM_TRANSPORT_FIXTURE_HPP
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